Crusher



Nov- 9, 1926. 1,606,228

A. M. HUNT GRUSHER Filed April 27, 1926 2 Sheets-Sheet 1 awvantozPatented Nev. e, 1925.

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ANDREW IE. HUNT, OF BERKELEY, CALIFORNIA, ASSI GNOR T0 STANDARD STOKERCOMPANY, INCORPORATED, A- CORPORATION OE DELAWARE.

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Application filed April 27, 1926. Serial No. 104,875.

In stoker s, of this character, it has been .he practice to employ acrusher plate mounted over the conveyor screw at the forward end of thecoal bin, which plate is provided with rearwardly projecting teethadapted to cooperate with the screw in crushing the large lumps of coalas they are fed forward a by the-screw. In the practical operation ofdevices of this character, the crusher plate,

which is mounted closeto the screw, forms' an abutment-or obstruction tothe coal in its forward movement under the influence of the screw, withthe resultv that some of thiscoal is turned or moved upwardly at therear of the crushing plate. One object of the present inventionis toprovide an improved means whereby the upward motion Of the coal,directly to the rear of the crushing plate, may be taken advantage of incausing a splitting or breaking up of the large pieces of coal, and forthis purpose, I provide a plurality of downwardly extending teethlocated above the conveyor screw and somewhat to the rear of "thecrusher plate heretofore employed. which teeth will be engaged by theupwardly moving pieces of coal and such pieces be effectively reducedthereby. A further object of my invention is to provide an improvedcrushing means of the character described which is simple andgtrong in,construction, wherein the downwardly directed teeth are rigidlysupported and at the'same time provision is madewhereby. in case ofjamming beneath the downwardly extending teeth, access may readily beobtained to the jam so as to loosen the same and remove any foreignobstruction which may have been the cause of the jam. 'Other objects ofmy invention willappear from the following description taken in.contit1on24 and formed with a lower nection with the accompanyingdrawing, which shows two of the preferred embodiments of my invention,and wherein- Fig. 1 is a fragmentary longitudinal sec tion of thelocomotive tender showing a portion of the coal bin, conveying mechanismand one form of my improved crushing means.

Fig. 2 is an enlarged transverse scrii taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged top plan View of the conveyor trough lookingdownwardly at the crusher and conveyor screw.

Figs. 4 and 5 are views similar to Figs.

2 and 3 respectively,'but showing a modified i form of my improvedcrushing means, and

F 1g. 6 is a section taken on the line 6-6 of Fig. 4.

Referring to Fig. 1, 19 represents the frame of a locomotive tnderand 11a coal receptacle or bin carried thereby. The bottom of the bin 11 isprovided with a central longltudmal opening 12 through which coal isadapted to pass to the conveyor trough 13. "The floor'of the coal bin isinclined downwardly to the trough 13 at the sides and back thereof, sothat the coal will move downwardly along the inclined floor into p0-sition to enter the trough 13. Removable cover sections-15 may he slidforward or moved from covering position to permit the entry of coal intothe trough 13 as the supply becomes depleted. .Operating in the trough13, and journaled at the ends of the trough in the manner shown is asection 20 of the conveyor screw 21. -'Ihe screw is adapted to beoperated through a gear 22 located at the rear. end of the trough 13from suitable source of power not shown. The conveyor, of which the rearportion only 1s shown in Fig. 1, extends. forwardly to the locomotiveand comprises aplurality of sections which are flexibly Ijoinedto oneanother so as to permit relative movements between the locomotive andits tenderv without damaging the conveyor. The forward end of the trough13 is formed by, a partltion or plate 24 having an opening 25therethrough, which forms a restriction in the passage through whichcoal is movedby the conveyor screw. Mountedgonj the parr SQ i opening 26which embraces the upper portion of the conveyor screw, is a crusherplate 30 which is provided with rearwardly extending spurs projections35.

' Secured nea the forward ends of the upper edges of trough 13, in anysuitable manner as by rivets 36, are crushing members 37, 38, whichcomprise base portions and .38, are, preferably, cast so as to fit thecontour of the trough 13 and their forward ends are formed with flanges50, which may, if dzsired, be secured to the partition or plate 2 Inoperation, coal which enters the trough 13 from the bin 11 is carriedforward by rotation of the screw 20, and lumps of coal which passbeneath the projections .45, 46

and 47 meet the projections 35 on the plate. .30and are split or brokenand are carried by the screw 20 out of the trough through the restrictedsection of the passage, formed by the opening 25. The pressing of thevmass of coal against the plate 30 by the action of the screw 20 has theeffect of forcing the lum s of coal, which lie-somewhat to the time thebin is filled with coal.

serves to relieve pressure beneath the prothe rear 0 the plate 30,upwardly. The

. teeth 45, 46 and 47 are so located as to be engaged by.these upwardlymovinglumps, with the result that. these lumps are split 'to the propersize. It will be noted that should jamming occur beneath the teeth, asby the presence of foreign obstruction in the mass of coal, a tool mayreadily be inserted from above so as to break up the jam or dislodge theobstruction, the projections and the plate 30 being so spaced as topermit ready access in the front part of the interior of trough. Theupper portions of the projecting members 42 and 43, are, referably,approximately flat, so as to f drm a partial support for the coal lyingabove-them at jections which might tend to produce a jam and so pergmtsa more eflicient crushing and convevmg action in thejtrough.

In the orm of my invention in Figs. 4'

to -6, the downwardly projecting teeth 50 and 51 are formed on amember52 which extends partway or entirely across the to 1 of the trough.-Member 52 may be secured to the sides of the trough at'the top byrivets. 53,, which extend through forwardl This projecting supportingfeet 54 at the ends of the member 52, or in certain cases member 52 beformed integral with the plate 30. In either case, the ember 52 isspaced some distance to the r ar of the plate 30 so as to position theteeth 50 and 51 for proper' engagement with the coal, and also so as topermit a tool to be inserted betweenthe plate 30 and member 52 to loosena jam or dislodge any obstructing material beneath the member 52.

I claim:-

1. In a stoker, a structure formed with a passage having a restrictedsection at one point, a conveyor screw operating in said passage toforce coal through said section, and crushing means comprisingprojecting members extending inwardly from opposite sidesof saidpassage, said projecting members' being formed with downwardly extendingteeth spaced from said screw and to the rear of said section, said teethbeing adapted to split coal which is moved upward at the rear of saidsection by the thrust from the screw against the restriction.

2. In a stoker, a structure formed with a passage having a restrictedsection at one point, a conveyor screw operating in said passage toforce coal through said section and crushing means comprising rearwardlyextending coal engaging projections around the upper portion of saidopening and downwardly projecting teeth spaced above said screw and tothe rear of said projections, said teeth being adapted to sp it coalwhich is moved upward at the rear of said section by the thrust from'thescrew against the restriction.

3. In a stoker, a structure formed with a passage having a restrictedsection at one point, a conveyor screw operating in said passage toforce coal through saidsection and crushin section, and formed withrearwardly extending coal-engag'ng projections, andsaid crushmg means aso-compr1s1ng pro ecting members extending inwardly. from opposite sidesof said passage, said projecting members being formed with downwardlyextend- 7 ing teeth spaced above said screwand to the rear of saidprojections.

4. In a, device of the class described, a conveyor comprising'a trough,a receptacle adaptedto discharge downwardly into sa d trough, aconveyor'screw operating 1n. said trough, a crusher plate at the forwardend of said trough above said screw and a crushing member. comprising abase portion secured to the. upper part of one side of said trou handextending rearwardly from said crus er plate, said'base portion beingpro means comprising a crusher .plate poslti ned above said screw, atsaid vided "with inwardly, laterally extending.v

projecting members, and said. projecting members being provided withdownwardly extending teeth spaced above said conveyor screw.

5. In a device of the class described, a conveyor comprising a trough, areceptacle adapted to discharge downwardly into said trough, a conveyorscrew operating in said trough, a crusher plate at the forward end ofsaid trough above said screw and crushing members comprising baseportions secured to opposite sides of said trough and extendingrearwardly from said crusher plate, said base portions being providedwith inwardly, laterally extending projecting members, and saidprojecting members being provided with downwardly extending teeth spacedabove said conveyor screw. 6. In a device of the class described, a

conveyor comprising a trough, a receptacle adapted to dischargedownwardly into said trough, a conveyor screw operating in said trough,a crusher plate at the forward end of said trough above said screw andcrushing members comprising base portions se-' cured to opposite sidesof said trough and extending rearwardly from said crusher greaterdistance from said plate being shorter than the'projecting memberslocate-d nearer said plate.

ANDREW M. HUNT.

